Plastic optical fiber sensing system for simultaneously measuring blood sugar concentration and blood oxygen concentration

Abstract

The invention discloses a plastic optical fiber sensing system for simultaneously measuring blood sugar concentration and blood oxygen concentration, comprising a light source, a low-pass optical filter, a sensing pool, a sensing head, a high-pass optical filter and a photoelectric detector. The plastic optical fiber sensing system is characterized in that the head of the sensing head is provided with a U-shaped optical fiber of which the sheath is stripped; sol-gel containing fluorescence indicator o-phenanthroline ruthenium and glucose oxidase is coated on the outer wall of the U-shaped optical fiber; the sensing head is prepared in such a way that light emitted by the light source is coupled by the low-pass optical filter to enter a plastic optical fiber; the phenanthroline ruthenium on the sensing head emits the fluorescence of 574 nm; after the fluorescence passes through the high-pass optical filter, the fluorescence strength is measured by the photoelectric detector to obtain the blood oxygen concentration and the blood sugar concentration; when the blood sugar concentration and the blood oxygen concentration are simultaneously measured, the invention has high sensitivity, simple structure and low cost, is difficult to interfere by an external environment and has the minimal measurement value of blood sugar, which reaches 1 mg / L, and the minimal measurement value of blood oxygen, which reaches 0.1 mg / L.

Description

technical field [0001] The invention relates to a plastic optical fiber sensing system for simultaneous measurement of blood sugar and blood oxygen concentration, which belongs to the field of sensing systems. Background technique [0002] Diabetes is a common disease. It is the second killer of modern diseases. Its harm to the human body is second only to cancer. It has become the chief culprit endangering the quality of human life. Diabetes tends to expand and rejuvenate. According to the latest epidemiological survey data, the prevalence of diabetes in my country is as high as 3%, and the number of patients is as high as 40 million. According to the forecast of the World Health Organization, by 2025, the number of diabetic patients in the world will reach 150 million. At present, the key to effective management of diabetes is blood glucose detection, which is divided into various optical methods and electrochemical methods. [0003] Optical method: [0004] (1) Using ...

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Problems solved by technology

[0010] The present invention is to solve many shortcomings of existing blood glucose detectors, and proposes a plastic optical fiber sensing system that can be used for simultaneous measurement of blood glucose and blood oxygen concentration

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